base: Get rid of 'using' declaration of StringAppendF.

net/url_request/view_cache_helper.cc

 // Copyright (c) 2006-2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/url_request/view_cache_helper.h"
 
 #include "base/string_util.h"
 #include "net/base/escape.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
@@ skipping 10 matching lines @@
   "</table></body></html>"
 
 namespace {
 
 void HexDump(const char *buf, size_t buf_len, std::string* result) {
   const size_t kMaxRows = 16;
   int offset = 0;
 
   const unsigned char *p;
   while (buf_len) {
-    StringAppendF(result, "%08x:  ", offset);
+    base::StringAppendF(result, "%08x:  ", offset);
     offset += kMaxRows;
 
     p = (const unsigned char *) buf;
 
     size_t i;
     size_t row_max = std::min(kMaxRows, buf_len);
 
     // print hex codes:
     for (i = 0; i < row_max; ++i)
-      StringAppendF(result, "%02x  ", *p++);
+      base::StringAppendF(result, "%02x  ", *p++);
     for (i = row_max; i < kMaxRows; ++i)
       result->append("    ");
 
     // print ASCII glyphs if possible:
     p = (const unsigned char *) buf;
     for (i = 0; i < row_max; ++i, ++p) {
       if (*p < 0x7F && *p > 0x1F) {
         AppendEscapedCharForHTML(*p, result);
       } else {
         result->push_back('.');
@@ skipping 294 matching lines @@
     entry_ = NULL;
   }
   return OK;
 }
 
 void ViewCacheHelper::OnIOComplete(int result) {
   DoLoop(result);
 }
 
 }  // namespace net.